I represent a group of researchers from the universities of Aberystwyth and East Anglia, and we have just begun a major international study of people's memories of Ridley Scott's Alien.

Partly inspired by the recent release of Prometheus, we are asking people to go to our website to take part in a brief questionnaire, designed to let people share with us their recollections of a fantastic piece of film history. We're interested in hearing from anyone who has ever seen the film - whether or not they enjoyed it - to definitively chart audiences' responses.